Tramway rail having removable tread



F. ADAMS. y TBAMWAY RAILHAVING REMOVABLE TRE/1D.v

APPLICATIONFILED NOV, I6. 192i'.

' Patented June 6, 192.2.A

' AToRyEYs,

UNITED sr TRAMWAY aan; HAVING REMOVABLETREAD.

To all whom t may concern: f

Be it'known that I, FREDERICK ADAMS, va

subject ot the 'King of `Great Britain and lreland, residing at l/VinHill vView, Bradwcll, in the county ol' Derby, England,have inventedImprovements in `and* Relating to Tramway Rails Having Removable Treads,of which the Afollowing is a speciiCation.

This invention relates totramway rails having detachable wearing treadsthe object.- o the inventionbeing to construct said rails in such amanner that the wea-ring treads may be readily removed,Whenworn'v andreplaced lby new ones.A v. y

According. to this `invention the .rail is built up oit' two parts thegirderor weight supporting part and the treadv or wearing part; thegir-der portion preferably of Iseojtion is provided with a. trough onits upper side or fiange such trough being formed With a pluane.horizontal floor and outwardly sloping plane sides; the tread is madewith a horizontal base andplane sloping longitudinal sides substantiallycongruent with the trough inthe girder portion above described, Thetread is secured at 'frequent intervals say three feet centres) to thegirder portion -by means of screw studs or the like passing through thehead of the girder portion and into the tread; holes are provided inthe"v web oft' the vgirder or bearerportion immediately belon7V thevupper 'flange torftheinsertion and accommodation of bolts or the nutsot studs. Spring washers or other known security devices may be used.

A method of carrying out the invention is here described and for thispurpose reference is had to a sheet ot' drawingswhich accompanies thisspecification; similar 'reference letters are used in all the views torefer to the same or similar parts.

Fig. lshews partly in elevation and partly in longitudinal medialsection a portion of 'a track rail constructed after the manner oit thisinvention.

Fig. Il shews 4a complete transverse section of Fig. I on the centreline Xj-*Y of the fixing stud or the like. -Reterring to the drawings:,-A is th girder portion or bearer withv its upper flange A1 formed asa trough With a i I Specicationof Letters Patent. Patented June 6,Application ined no vembm- 1e, i921. serial No. 515,482. C V

horizontal plane .base '.Gland plane ioutwjardly sloping sides GQ, B .isthe tread or over the hole F 'for the accommodation of -a stud @withscrewed ends C1 and CA2. The `end C1@ 1s screwedy into the underside of'B and the end P projects below'the `flange A1 andk into the hole'llandthere fitted with l y a nutll and spring washer D for securing' thetread to the bearer. The hole F is made sutlicientlyflarge to allow of'a spanner being {if} applied tothe nut E for screwing itlup; 'l

The 4rentralor body portion ol the studi() is f preterably roi-med asshown, that is, having a sectional area larger than that ott the screw 1Studs' or the like'asV portions C1 and; C2. C and accommodation v`forthe saine` are pro- 'vided at intervals o'fsay three feet alongl thetrack and such central body :portions serve to prevent anytendency oilthe tread to creep on the vgirder.

Having now particularly described andvr Aascertained thenatureof my saidinvention and in what .manner the same isto lbe. per--v formed, ldeclarer that what I claim'is :1-

A track rail with separate bearer `vand tread portions the bearer havingits. upper part or liange formed as a trough with plane horizontalbaseand planel outwardly.slop-- f ing sides in combinationwith a treadpor-v tion having a base and sides shaped congiu-' ently with thoseoitthe trough in the bearer:

screw studs secured in thebase of the tread i.

and projecting` downwards through holes inthe head ot'T the bearer andinto (holes in the web of the same and there itted'with ywashers andnutsfo-r securing the tread to the bearer, the whole in combination andas or substantially as herein described and illustrated by the drawings.

Datedthe 23rd day of September, i921. ln testimony whereof I atliX` mysignature in the presence of two Witnesses. i

s FREDnRioK Ain-AMS. 1 Witnesses: i

ALLAN H. STYRING,

ySAML. Jas. A. MILLs.

